12947381 has 2 divisors, whose sum is σ = 12947382. Its totient is φ = 12947380.

The previous prime is 12947351. The next prime is 12947401. The reversal of 12947381 is 18374921.

12947381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12666481 + 280900 = 3559^2 + 530^2 .

It is an emirp because it is prime and its reverse (18374921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12947381 - 2¹⁰ = 12946357 is a prime.

It is a super-2 number, since 2×12947381² = 335269349518322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12947351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6473690 + 6473691.

It is an arithmetic number, because the mean of its divisors is an integer number (6473691).

Almost surely, 2^12947381 is an apocalyptic number.

It is an amenable number.

12947381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12947381 is an equidigital number, since it uses as much as digits as its factorization.

12947381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 12947381 is about 3598.2469342723. The cubic root of 12947381 is about 234.8157964988.

The spelling of 12947381 in words is "twelve million, nine hundred forty-seven thousand, three hundred eighty-one".